One way to I've been thinking about technology is how easily the outcome of a war between our current year and a prior year in the same country would turn out.

One way to I've been thinking about technology is how easily the outcome of a war between our current year and a prior year in the same country would turn out. For instance, could the U.S. of 2013 easily defeat the U.S. of 1993. I know for a fact that the U.S of 1960 would make short work of the U.S. of 1940. I think the U.S. of 1973 would give the U.S. of 1993 much more of a problem, however.